Hi Revathi,
We have user docs at https://confluence.atlassian.com/display/STASH/Stash+Documentation+Home (which is indeed a Confluence wiki.
We use other technologies for other kinds of documentation.
You may need to refine your question for a better answer. I'm not sure why you'd need to know how we implement our documentation, so I'm not sure I'm answering the right question.
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